5/23/2006
Three Banded Bald Eagles Recovered in Alabama
Three bald eagles previously known to wildlife biologists were found dead in
Alabama this nesting season. During March
2006, two banded bald eagles released as part of the Alabama Department of
Conservation and Natural Resources’ Bald Eagle Restoration Program, were
found dead and their bands recovered.
A third banded eagle, which was released in
Mississippi in 1992 and had lived most of
its life in
Alabama, was also recovered. The status
of each of these birds had been followed by wildlife biologists for many
years by tracking their nesting efforts. While banded eagles are
occasionally recovered, finding three banded birds in the same season is
somewhat unusual.
In the 19 years since bald eagles began re-nesting in
Alabama, as of 2005, there have been 415
known nesting attempts, with 462 young eagles successfully fledging these
nests. Currently, state wildlife biologists are monitoring 73 active nests
throughout the state. The recovery of the bald eagle in
Alabama, and indeed nationwide, has been
one of the most remarkable success stories in wildlife management.
In the early 1980s, the Bald Eagle Restoration Project was established to
restore nesting bald eagles to the state. Historically, bald eagles nested
along the
Gulf
Coast and in the
Tennessee
Valley in
Alabama. The population dwindled in the
1950s and 1960s due mainly to the devastating effects of DDT pesticide
poisoning. The chemical caused the eagles and other bird species to lay eggs
with shells so thin that they often broke during incubation, failing to
hatch. The population plummeted, wintering birds in
Alabama became very rare and the breeding
population completely died out. DDT was banned in 1972 and the population
slowly began to increase.
A few eagles would overwinter in
Alabama but these birds migrated north in
the spring to nest. They were not imprinted upon
Alabama for their nesting behavior. To be
successful, juvenile eagles would have to be forced to take their first
flight in
Alabama to become imprinted on the
geographic area. This process is known as hacking, and from 1985-91,
ninety-one juvenile eagles were released. All these eagles were banded at
the time of release.
Examination of band numbers revealed the identity and history of the
recently recovered birds. One male bald eagle was banded, radio-tagged and
released on ADCNR’s Mud Creek Wildlife Management Area in April 1987. The
bird was 19 years old and was found dead in March near a nest. At 19 years,
it is possible that this bird was near the end of its natural lifespan.
The second recovered eagle, a male, was banded and released in March 1991
from an ADCNR hacking tower on the Choctaw National Wildlife Refuge in
Choctaw
County. It was recovered by a
road near the
Black Warrior River and is believed to have been hit
by a vehicle.
A third bird was recovered during the fall of 2005. Banded in 1992 near
Smithville,
Mississippi, this bird was one of a pair
that had nested for many years near the
Coosa
River in
Chilton
County. With its mate, this bird
had fledged at least eight young eagles from its nest site on Chestnut
Creek.
These birds and others released from 1985-91 represent the original
“stock” used to restore nesting bald eagles. Currently, several generations
of birds, offspring of this original group, are also imprinted on
Alabama and are nesting throughout the
state.
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